Prosthetic valve key



FIG. 1 is a perspective view showing our new design of a prosthetic valve key; the broken lines are shown for illustrative purposes only;

FIG. 2 is an elevation view taken from the top of FIG. 1;

FIG. 3 is a elevation view taken from the bottom of FIG. 3;

FIG. 4 is a front elevation view taken from the front of FIG. 1; and

FIG. 5 is an end elevation view taken from either the left or right side of FIG. 4. 

The ornamental design for the prosthetic valve key, substantially as shown and described. 